Most of us just sit here wishing you can be allowed to own a gun, but not buy a fucking assault rifle from some random dickhead at at a gun fair.

You’ve fallen into the trap yourself. “Assault rifles” are defined as “select fire rifles in an intermediate caliber intended for infantry use.” Select fire rifles have been banned in the US since 1986, 37yr ago, unless you have your Class III SOT (which means you have the licencure required to own them because you showed an ATF agent your business plan of selling them to mil and police.)

What you have an issue with is just a regular semiautomatic rifle that cosmetically looks scary and black, but functions just like every other semi auto rifle or pistol on the planet. Not only that, but all rifles (not even just ARs, all rifles) are responsible for 500/60,000 gun deaths for a rate of 0.2% of gun deaths. Banning them would do nothing, mass shooters already use handguns more and as we see from the VT shooting you can kill a lot of unarmed people with them.